Carbon-paper sheet



E. P. S. NEWMAN CARBON PAPER SHEET Filed June 5, 1924 Sept. 28 1926.

Patented Sept. 28, 1926.

aeolian EDWIN-P. s. NEWMAN, or wasnm'eron, DISTRICT or COLUMBIA,Assrenon. or ONE- HALF TO EDWARD R. WALTON, JR., OF WASHINGTON, DISTRICTOF COLUMBIA.

cannon-PAPER sneer.

Application filed June 3,

My invention relates to an improvement provide a carbon sheet with oneor more turned over edges, whereby a stifl'ened edge is provided toprevent curling, and an uncarbonized .surface is presented 'for itsmanipulation. 'This is illustrated in the accompanying drawing in whichFigure 1 shows the carbon sheet embodying the invention; and,

Figure 2 shows a cross section. v

In the drawing, the sheet of carbon paper, I is shown with one or moreturned over edge 2 and 3 of convenient width. These edge: are preferablyprovided at the top and bottom or transverse portions of the sheet forconvenience handling and to avoid interference with the use of thecarbon paper in a typewriting machine. As shown the impression orcarbonized surface is folded ,upon itself thus providing an edge, bothsurfaces, 5 and 6, of. which are uncarbonized. Mere folding of the papermay bei'sufficient but I prefer to secure the folded portion to the bodyof the sheet. I have discovered that this may readily be done withcarbon paper of usual composition by running a heatedsurface over thefolded portion which causes the juxtaposed carbonized surface to adhereand so bind the paper edge to the body surface. A small degree of heatis all that is usually required, but evidently the carbon compositionwill dictate whether heat ,tnay be used'andthe degree of heat that isnecessary. Suitable adhesives may be 1924. Serial No. 717,619.

used inthe place of heat treatment. By the term carbon paper I includeany paper used for manifold purposes.

I claim:

1. A sheet of carbon paper having one surface at one end of the paperuncarbonized and folded over upon the body of the sheet to provide aclean marginal portion at said eifid of the sheet and on opposite sidesthere 0 2. A sheet of paper carbonized on one surface and having its topend portion folded upon itself transversely and upon the carbonizedsurface thereof, whereby a clean marginal surface is provided at saidend of the carbonized surface of the sheet, said folded portion beingsecured to the body of the sheet and reinforcing the same.

3. A sheet of carbon paper having one surface unca-rbonized and beingfolded at at least one of its edge portions upon the carbonized surfaceof the sheet to provide a reinforceduncarbonized marginal of the sheet.

4. A sheet of carbon paper having its transverse end portionuncarbonized at least on one surface thereof and folded over upon thesheet to providea clean marginal portion on opposite sides thereof andat both ends of said sheet.

5. A process of preparing carbon paper haying a carbonized surface whichcomprises folding an edge of the paper upon the carbonized surface andin securing the edge to the body of the paper by the adhesive action ofthe carbonized surface.

6. A process of preparing carbon paper having acarbonized surface whichcomprises folding an edge of the paper upon the carbonized surface andin securing the edge to the body of the paper by the adhesive action ofthe carbonized surface through the application of heat.

In testimony whereof I aflix my signature.

E. P. S.

portion at said edge

